selinux-policy/strict/macros/global_macros.te

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##############################
#
# Global macros for the type enforcement (TE) configuration.
#
#
# Authors: Stephen Smalley <sds@epoch.ncsc.mil> and Timothy Fraser
# Howard Holm (NSA) <hdholm@epoch.ncsc.mil>
# Russell Coker <russell@coker.com.au>
#
#
#
##################################
#
# can_setexec(domain)
#
# Authorize a domain to set its exec context
# (via /proc/pid/attr/exec).
#
define(`can_setexec',`
allow $1 self:process setexec;
allow $1 proc_t:dir search;
allow $1 proc_t:{ file lnk_file } read;
allow $1 self:dir search;
allow $1 self:file { getattr read write };
')
##################################
#
# can_getcon(domain)
#
# Authorize a domain to get its context
# (via /proc/pid/attr/current).
#
define(`can_getcon',`
allow $1 proc_t:dir search;
allow $1 proc_t:{ file lnk_file } read;
allow $1 self:dir search;
allow $1 self:file { getattr read };
allow $1 self:process getattr;
')
##################################
#
# can_setcon(domain)
#
# Authorize a domain to set its current context
# (via /proc/pid/attr/current).
#
define(`can_setcon',`
allow $1 self:process setcurrent;
allow $1 proc_t:dir search;
allow $1 proc_t:{ file lnk_file } read;
allow $1 self:dir search;
allow $1 self:file { getattr read write };
')
##################################
# read_sysctl(domain)
#
# Permissions for reading sysctl variables.
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# If the second parameter is full, allow
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# reading of any sysctl variables, else only
# sysctl_kernel_t.
#
define(`read_sysctl', `
# Read system variables in /sys.
ifelse($2,`full', `
allow $1 sysctl_type:dir r_dir_perms;
allow $1 sysctl_type:file r_file_perms;
', `
allow $1 sysctl_t:dir search;
allow $1 sysctl_kernel_t:dir search;
allow $1 sysctl_kernel_t:file { getattr read };
')
')dnl read_sysctl
##################################
#
# can_setfscreate(domain)
#
# Authorize a domain to set its fscreate context
# (via /proc/pid/attr/fscreate).
#
define(`can_setfscreate',`
allow $1 self:process setfscreate;
allow $1 proc_t:dir search;
allow $1 proc_t:{ file lnk_file } read;
allow $1 self:dir search;
allow $1 self:file { getattr read write };
')
#################################
#
# uses_shlib(domain)
#
# Permissions for using shared libraries.
#
define(`uses_shlib',`
allow $1 { root_t usr_t lib_t etc_t }:dir r_dir_perms;
allow $1 lib_t:lnk_file r_file_perms;
allow $1 ld_so_t:file rx_file_perms;
#allow $1 ld_so_t:file execute_no_trans;
allow $1 ld_so_t:lnk_file r_file_perms;
allow $1 { texrel_shlib_t shlib_t }:file rx_file_perms;
allow $1 { texrel_shlib_t shlib_t }:lnk_file r_file_perms;
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allow $1 texrel_shlib_t:file execmod;
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allow $1 ld_so_cache_t:file r_file_perms;
allow $1 device_t:dir search;
allow $1 null_device_t:chr_file rw_file_perms;
')
#################################
#
# can_exec_any(domain)
#
# Permissions for executing a variety
# of executable types.
#
define(`can_exec_any',`
allow $1 { bin_t sbin_t lib_t etc_t }:dir r_dir_perms;
allow $1 { bin_t sbin_t etc_t }:lnk_file { getattr read };
uses_shlib($1)
can_exec($1, etc_t)
can_exec($1, lib_t)
can_exec($1, bin_t)
can_exec($1, sbin_t)
can_exec($1, exec_type)
can_exec($1, ld_so_t)
')
#################################
#
# can_sysctl(domain)
#
# Permissions for modifying sysctl parameters.
#
define(`can_sysctl',`
allow $1 sysctl_type:dir r_dir_perms;
allow $1 sysctl_type:file { setattr rw_file_perms };
')
##################################
#
# read_locale(domain)
#
# Permissions for reading the locale data,
# /etc/localtime and the files that it links to
#
define(`read_locale', `
allow $1 etc_t:lnk_file read;
allow $1 lib_t:file r_file_perms;
r_dir_file($1, locale_t)
')
###################################
#
# access_terminal(domain, typeprefix)
#
# Permissions for accessing the terminal
#
define(`access_terminal', `
allow $1 $2_tty_device_t:chr_file { read write getattr ioctl };
allow $1 devtty_t:chr_file { read write getattr ioctl };
allow $1 devpts_t:dir { read search getattr };
allow $1 $2_devpts_t:chr_file { read write getattr ioctl };
')
#
# general_proc_read_access(domain)
#
# Grant read/search permissions to most of /proc, excluding
# the /proc/PID directories and the /proc/kmsg and /proc/kcore files.
# The general_domain_access macro grants access to the domain /proc/PID
# directories, but not to other domains. Only permissions to stat
# are granted for /proc/kmsg and /proc/kcore, since these files are more
# sensitive.
#
define(`general_proc_read_access',`
# Read system information files in /proc.
r_dir_file($1, proc_t)
r_dir_file($1, proc_net_t)
allow $1 proc_mdstat_t:file r_file_perms;
# Stat /proc/kmsg and /proc/kcore.
allow $1 proc_fs:file stat_file_perms;
# Read system variables in /proc/sys.
read_sysctl($1)
')
#
# base_file_read_access(domain)
#
# Grant read/search permissions to a few system file types.
#
define(`base_file_read_access',`
# Read /.
allow $1 root_t:dir r_dir_perms;
allow $1 root_t:notdevfile_class_set r_file_perms;
# Read /home.
allow $1 home_root_t:dir r_dir_perms;
# Read /usr.
allow $1 usr_t:dir r_dir_perms;
allow $1 usr_t:notdevfile_class_set r_file_perms;
# Read bin and sbin directories.
allow $1 bin_t:dir r_dir_perms;
allow $1 bin_t:notdevfile_class_set r_file_perms;
allow $1 sbin_t:dir r_dir_perms;
allow $1 sbin_t:notdevfile_class_set r_file_perms;
read_sysctl($1)
r_dir_file($1, selinux_config_t)
if (read_default_t) {
#
# Read default_t
#.
allow $1 default_t:dir r_dir_perms;
allow $1 default_t:notdevfile_class_set r_file_perms;
}
')
#######################
# daemon_core_rules(domain_prefix, attribs)
#
# Define the core rules for a daemon, used by both daemon_base_domain() and
# init_service_domain().
# Attribs is the list of attributes which must start with "," if it is not empty
#
# Author: Russell Coker <russell@coker.com.au>
#
define(`daemon_core_rules', `
type $1_t, domain, privlog, daemon $2;
type $1_exec_t, file_type, sysadmfile, exec_type;
dontaudit $1_t self:capability sys_tty_config;
role system_r types $1_t;
# Inherit and use descriptors from init.
allow $1_t init_t:fd use;
allow $1_t init_t:process sigchld;
allow $1_t self:process { signal_perms fork };
uses_shlib($1_t)
allow $1_t { self proc_t }:dir r_dir_perms;
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allow $1_t { self proc_t }:lnk_file { getattr read };
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allow $1_t device_t:dir r_dir_perms;
ifdef(`udev.te', `
allow $1_t udev_tdb_t:file r_file_perms;
')dnl end if udev.te
allow $1_t null_device_t:chr_file rw_file_perms;
dontaudit $1_t console_device_t:chr_file rw_file_perms;
dontaudit $1_t unpriv_userdomain:fd use;
r_dir_file($1_t, sysfs_t)
allow $1_t autofs_t:dir { search getattr };
ifdef(`targeted_policy', `
dontaudit $1_t { tty_device_t devpts_t }:chr_file { read write };
dontaudit $1_t root_t:file { getattr read };
')dnl end if targeted_policy
')dnl end macro daemon_core_rules
#######################
# init_service_domain(domain_prefix, attribs)
#
# Define a domain for a program that is run from init
# Attribs is the list of attributes which must start with "," if it is not empty
#
# Author: Russell Coker <russell@coker.com.au>
#
define(`init_service_domain', `
daemon_core_rules($1, `$2')
domain_auto_trans(init_t, $1_exec_t, $1_t)
')dnl
#######################
# daemon_base_domain(domain_prefix, attribs)
#
# Define a daemon domain with a base set of type declarations
# and permissions that are common to most daemons.
# attribs is the list of attributes which must start with "," if it is not empty
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# nosysadm may be given as an optional third parameter, to specify that the
# sysadmin should not transition to the domain when directly calling the executable
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#
# Author: Russell Coker <russell@coker.com.au>
#
define(`daemon_base_domain', `
daemon_core_rules($1, `$2')
rhgb_domain($1_t)
read_sysctl($1_t)
ifdef(`direct_sysadm_daemon', `
dontaudit $1_t admin_tty_type:chr_file rw_file_perms;
')
#
# Allows user to define a tunable to disable domain transition
#
ifelse(index(`$2',`transitionbool'), -1, `', `
bool $1_disable_trans false;
if ($1_disable_trans) {
can_exec(initrc_t, $1_exec_t)
can_exec(sysadm_t, $1_exec_t)
} else {
') dnl transitionbool
domain_auto_trans(initrc_t, $1_exec_t, $1_t)
allow initrc_t $1_t:process { noatsecure siginh rlimitinh };
ifdef(`direct_sysadm_daemon', `
ifelse(`$3', `nosysadm', `', `
domain_auto_trans(sysadm_t, $1_exec_t, $1_t)
allow sysadm_t $1_t:process { noatsecure siginh rlimitinh };
')dnl end direct_sysadm_daemon
')dnl end nosysadm
ifelse(index(`$2', `transitionbool'), -1, `', `
}
') dnl end transitionbool
ifdef(`direct_sysadm_daemon', `
ifelse(`$3', `nosysadm', `', `
role_transition sysadm_r $1_exec_t system_r;
')dnl end nosysadm
')dnl end direct_sysadm_daemon
allow $1_t privfd:fd use;
ifdef(`newrole.te', `allow $1_t newrole_t:process sigchld;')
allow $1_t initrc_devpts_t:chr_file rw_file_perms;
')dnl
# allow a domain to create its own files under /var/run and to create files
# in directories that are created for it. $2 is an optional list of
# classes to use; default is file.
define(`var_run_domain', `
type $1_var_run_t, file_type, sysadmfile, pidfile;
ifelse(`$2', `', `
file_type_auto_trans($1_t, var_run_t, $1_var_run_t, file)
', `
file_type_auto_trans($1_t, var_run_t, $1_var_run_t, $2)
')
allow $1_t var_t:dir search;
allow $1_t $1_var_run_t:dir rw_dir_perms;
')
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#######################
# daemon_domain(domain_prefix, attribs)
#
# see daemon_base_domain for calling details
# daemon_domain defines some additional privileges needed by many domains,
# like pid files and locale support
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define(`daemon_domain', `
ifdef(`targeted_policy', `
daemon_base_domain($1, `$2, transitionbool', $3)
', `
daemon_base_domain($1, `$2', $3)
')
# Create pid file.
allow $1_t var_t:dir { getattr search };
var_run_domain($1)
allow $1_t devtty_t:chr_file rw_file_perms;
# for daemons that look at /root on startup
dontaudit $1_t sysadm_home_dir_t:dir search;
# for df
allow $1_t fs_type:filesystem getattr;
allow $1_t removable_t:filesystem getattr;
read_locale($1_t)
# for localization
allow $1_t lib_t:file { getattr read };
')dnl end daemon_domain macro
define(`uses_authbind',
`domain_auto_trans($1, authbind_exec_t, authbind_t)
allow authbind_t $1:process sigchld;
allow authbind_t $1:fd use;
allow authbind_t $1:{ tcp_socket udp_socket } rw_socket_perms;
')
# define a sub-domain, $1_t is the parent domain, $2 is the name
# of the sub-domain.
#
define(`daemon_sub_domain', `
# $1 is the parent domain (or domains), $2_t is the child domain,
# and $3 is any attributes to apply to the child
type $2_t, domain, privlog, daemon $3;
type $2_exec_t, file_type, sysadmfile, exec_type;
role system_r types $2_t;
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ifelse(index(`$3',`transitionbool'), -1, `
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domain_auto_trans($1, $2_exec_t, $2_t)
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', `
bool $2_disable_trans false;
if (! $2_disable_trans) {
domain_auto_trans($1, $2_exec_t, $2_t)
}
');
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# Inherit and use descriptors from parent.
allow $2_t $1:fd use;
allow $2_t $1:process sigchld;
allow $2_t self:process signal_perms;
uses_shlib($2_t)
allow $2_t { self proc_t }:dir r_dir_perms;
allow $2_t { self proc_t }:lnk_file read;
allow $2_t device_t:dir getattr;
')
# grant access to /tmp
# by default, only plain files and dirs may be stored there.
# This can be overridden with a third parameter
define(`tmp_domain', `
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type $1_tmp_t, file_type, sysadmfile, polymember, tmpfile $2;
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ifelse($3, `',
`file_type_auto_trans($1_t, tmp_t, $1_tmp_t, `{ file dir }')',
`file_type_auto_trans($1_t, tmp_t, $1_tmp_t, `$3')')
')
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# grant access to /tmp. Do not perform an automatic transition.
define(`tmp_domain_notrans', `
type $1_tmp_t, file_type, sysadmfile, polymember, tmpfile $2;
')
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define(`tmpfs_domain', `
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ifdef(`$1_tmpfs_t_defined',`', `
define(`$1_tmpfs_t_defined')
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type $1_tmpfs_t, file_type, sysadmfile, tmpfsfile;
# Use this type when creating tmpfs/shm objects.
file_type_auto_trans($1_t, tmpfs_t, $1_tmpfs_t)
allow $1_tmpfs_t tmpfs_t:filesystem associate;
')
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')
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define(`var_lib_domain', `
type $1_var_lib_t, file_type, sysadmfile;
file_type_auto_trans($1_t, var_lib_t, $1_var_lib_t, file)
allow $1_t $1_var_lib_t:dir rw_dir_perms;
')
define(`log_domain', `
type $1_log_t, file_type, sysadmfile, logfile;
file_type_auto_trans($1_t, var_log_t, $1_log_t, file)
')
define(`logdir_domain', `
log_domain($1)
allow $1_t $1_log_t:dir { setattr rw_dir_perms };
')
define(`etc_domain', `
type $1_etc_t, file_type, sysadmfile, usercanread;
allow $1_t $1_etc_t:file r_file_perms;
')
define(`etcdir_domain', `
etc_domain($1)
allow $1_t $1_etc_t:dir r_dir_perms;
allow $1_t $1_etc_t:lnk_file { getattr read };
')
define(`append_log_domain', `
type $1_log_t, file_type, sysadmfile, logfile;
allow $1_t var_log_t:dir ra_dir_perms;
allow $1_t $1_log_t:file { create ra_file_perms };
type_transition $1_t var_log_t:file $1_log_t;
')
define(`append_logdir_domain', `
append_log_domain($1)
allow $1_t $1_log_t:dir { setattr ra_dir_perms };
')
define(`lock_domain', `
type $1_lock_t, file_type, sysadmfile, lockfile;
file_type_auto_trans($1_t, var_lock_t, $1_lock_t, file)
')
#######################
# application_domain(domain_prefix)
#
# Define a domain with a base set of type declarations
# and permissions that are common to simple applications.
#
# Author: Russell Coker <russell@coker.com.au>
#
define(`application_domain', `
type $1_t, domain, privlog $2;
type $1_exec_t, file_type, sysadmfile, exec_type;
role sysadm_r types $1_t;
domain_auto_trans(sysadm_t, $1_exec_t, $1_t)
uses_shlib($1_t)
')
define(`system_domain', `
type $1_t, domain, privlog $2;
type $1_exec_t, file_type, sysadmfile, exec_type;
role system_r types $1_t;
uses_shlib($1_t)
allow $1_t etc_t:dir r_dir_perms;
')
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# Dontaudit macros to prevent flooding the log
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define(`dontaudit_getattr', `
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dontaudit $1 file_type - secure_file_type:dir_file_class_set getattr;
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dontaudit $1 unlabeled_t:dir_file_class_set getattr;
dontaudit $1 { fs_type proc_fs dev_fs sysctl_type }:dir_file_class_set getattr;
')dnl end dontaudit_getattr
define(`dontaudit_search_dir', `
dontaudit $1 file_type - secure_file_type:dir search;
dontaudit $1 unlabeled_t:dir search;
dontaudit $1 { fs_type proc_fs dev_fs sysctl_type }:dir search;
')dnl end dontaudit_search_dir
define(`dontaudit_read_dir', `
dontaudit $1 file_type - secure_file_type:dir read;
dontaudit $1 unlabeled_t:dir read;
dontaudit $1 { fs_type proc_fs dev_fs sysctl_type }:dir read;
')dnl end dontaudit_read_dir
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# Define legacy_domain for legacy binaries (java)
# "legacy" binary == lacks PT_GNU_STACK header, i.e. built with an old
# toolchain. They cause the kernel to automatically start translating all
# read protection requests to read|execute for backward compatibility on
# x86. They will all need execmem and execmod, including execmod to
# shlib_t and ld_so_t unlike non-legacy binaries.
define(`legacy_domain', `
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allow $1_t self:process { execmem execstack };
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allow $1_t { texrel_shlib_t shlib_t }:file execmod;
allow $1_t ld_so_t:file execmod;
allow $1_t ld_so_cache_t:file execute;
')
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# Allow domain to perform polyinstantiation functions
# polyinstantiater(domain)
define(`polyinstantiater', `
ifdef(`support_polyinstantiation', `
# Need to give access to /selinux/member
allow $1 security_t:security compute_member;
# Need to give access to the directories to be polyinstantiated
allow $1 polydir:dir { getattr mounton add_name create setattr write search };
# Need to give access to the polyinstantiated subdirectories
allow $1 polymember:dir {getattr search };
# Need to give access to parent directories where original
# is remounted for polyinstantiation aware programs (like gdm)
allow $1 polyparent:dir { getattr mounton };
# Need to give permission to create directories where applicable
allow $1 polymember: dir { create setattr };
allow $1 polydir: dir { write add_name };
allow $1 self:process setfscreate;
allow $1 polyparent:dir { write add_name };
# Default type for mountpoints
allow $1 poly_t:dir { create mounton };
# Need sys_admin capability for mounting
allow $1 self:capability sys_admin;
')dnl end else support_polyinstantiation
')dnl end polyinstantiater
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#
# Domain that is allow to read anonymous data off the network
# without providing authentication.
# Also define boolean to allow anonymous writing
#
define(`anonymous_domain', `
r_dir_file($1_t, ftpd_anon_t)
bool allow_$1_anon_write false;
if (allow_$1_anon_write) {
create_dir_file($1_t,ftpd_anon_rw_t)
}
')
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#
# Define a domain that can do anything, so that it is
# effectively unconfined by the SELinux policy. This
# means that it is only restricted by the normal Linux
# protections. Note that you may need to add further rules
# to allow other domains to interact with this domain as expected,
# since this macro only allows the specified domain to act upon
# all other domains and types, not vice versa.
#
define(`unconfined_domain', `
typeattribute $1 unrestricted;
# Mount/unmount any filesystem.
allow $1 fs_type:filesystem *;
# Mount/unmount any filesystem with the context= option.
allow $1 file_type:filesystem *;
# Create/access any file in a labeled filesystem;
allow $1 file_type:{ file chr_file } ~execmod;
allow $1 file_type:{ dir lnk_file sock_file fifo_file blk_file } *;
allow $1 sysctl_t:{ dir file } *;
allow $1 device_type:devfile_class_set *;
allow $1 mtrr_device_t:file *;
# Create/access other files. fs_type is to pick up various
# pseudo filesystem types that are applied to both the filesystem
# and its files.
allow $1 { unlabeled_t fs_type }:dir_file_class_set *;
allow $1 proc_fs:{ dir file } *;
# For /proc/pid
r_dir_file($1,domain)
# Write access is for setting attributes under /proc/self/attr.
allow $1 self:file rw_file_perms;
# Read and write sysctls.
can_sysctl($1)
# Access the network.
allow $1 node_type:node *;
allow $1 netif_type:netif *;
allow $1 port_type:{ tcp_socket udp_socket } { send_msg recv_msg };
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allow $1 port_type:tcp_socket name_connect;
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# Bind to any network address.
allow $1 port_type:{ tcp_socket udp_socket } name_bind;
allow $1 node_type:{ tcp_socket udp_socket rawip_socket } node_bind;
allow $1 file_type:{ unix_stream_socket unix_dgram_socket } name_bind;
# Use/sendto/connectto sockets created by any domain.
allow $1 domain:{ socket_class_set socket key_socket } *;
# Use descriptors and pipes created by any domain.
allow $1 domain:fd use;
allow $1 domain:fifo_file rw_file_perms;
# Act upon any other process.
allow $1 domain:process ~{ transition dyntransition execmem };
# Transition to myself, to make get_ordered_context_list happy.
allow $1 self:process transition;
if (allow_execmem) {
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# Allow making anonymous memory executable, e.g.
# for runtime-code generation or executable stack.
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allow $1 self:process execmem;
}
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if (allow_execmem && allow_execstack) {
# Allow making the stack executable via mprotect.
allow $1 self:process execstack;
}
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if (allow_execmod) {
# Allow text relocations on system shared libraries, e.g. libGL.
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ifdef(`targeted_policy', `
allow $1 file_type:file execmod;
', `
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allow $1 texrel_shlib_t:file execmod;
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allow $1 home_type:file execmod;
')
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}
# Create/access any System V IPC objects.
allow $1 domain:{ sem msgq shm } *;
allow $1 domain:msg { send receive };
# Access the security API.
allow $1 security_t:security *;
auditallow $1 security_t:security { load_policy setenforce setbool };
# Perform certain system operations that lacked individual capabilities.
allow $1 kernel_t:system *;
# Use any Linux capability.
allow $1 self:capability *;
# Set user information and skip authentication.
allow $1 self:passwd *;
# Communicate via dbusd.
allow $1 self:dbus *;
ifdef(`dbusd.te', `
allow $1 system_dbusd_t:dbus *;
')
# Get info via nscd.
allow $1 self:nscd *;
ifdef(`nscd.te', `
allow $1 nscd_t:nscd *;
')
')dnl end unconfined_domain
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define(`access_removable_media', `
can_exec($1, { removable_t noexattrfile } )
if (user_rw_noexattrfile) {
create_dir_file($1, noexattrfile)
create_dir_file($1, removable_t)
# Write floppies
allow $1 removable_device_t:blk_file rw_file_perms;
allow $1 usbtty_device_t:chr_file write;
} else {
r_dir_file($1, noexattrfile)
r_dir_file($1, removable_t)
allow $1 removable_device_t:blk_file r_file_perms;
}
allow $1 removable_t:filesystem getattr;
')
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define(`authentication_domain', `
can_ypbind($1)
can_kerberos($1)
can_ldap($1)
can_resolve($1)
can_winbind($1)
r_dir_file($1, cert_t)
allow $1 { random_device_t urandom_device_t }:chr_file { getattr read };
allow $1 self:capability { audit_write audit_control };
dontaudit $1 shadow_t:file { getattr read };
')